class CodeClimate::TestReporter::PayloadValidator

def self.validate(payload)
  new(payload).validate
end

def commit_sha
  commit_sha_from_git || commit_sha_from_ci_service
end

def commit_sha_from_ci_service
  @payload[:ci_service] && @payload[:ci_service][:commit_sha]
end

def commit_sha_from_git
  @payload[:git] && @payload[:git][:head]
end

def committed_at
  (@payload[:git] && @payload[:git][:committed_at]) ||
    (@payload[:ci_service] && @payload[:ci_service][:committed_at])
end

def initialize(payload)
  @payload = payload
end

def run_at
  @payload[:run_at]
end

def source_files?
  @payload[:source_files] && @payload[:source_files].any?
end

def valid_source_file?(file)
  file.is_a?(Hash) && file[:coverage] && file[:name]
end

def valid_source_files?
  @payload[:source_files].all? { |s| valid_source_file?(s) }
end

def validate
  raise InvalidPayload, "A git commit sha was not found in the test report payload" unless commit_sha
  raise InvalidPayload, "A git commit timestamp was not found in the test report payload" unless committed_at
  raise InvalidPayload, "A run at timestamp was not found in the test report payload" unless run_at
  raise InvalidPayload, "No source files were found in the test report payload" unless source_files?
  raise InvalidPayload, "Invalid source files were found in the test report payload" unless valid_source_files?
  true
end